/*
 * @name: 
 * @Author: 刘大可
 * @Date: 2023-10-24 22:16:01
 * @LastEditors: 刘大可
 * @LastEditTime: 2023-10-24 22:16:58
 */
let a =12 
let b=12.3
let c=12.31
console.log(a.toFixed(2));
console.log(b.toFixed(2));
console.log(c.toFixed(2));